drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Ausführen beliebiger Kommandos in kvm
Name: |
Ausführen beliebiger Kommandos in kvm |
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ID: |
RHSA-2015:1189-01 |
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Distribution: |
Red Hat |
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Plattformen: |
Red Hat Enterprise Linux |
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Datum: |
Do, 25. Juni 2015, 16:49 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3209 |
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Applikationen: |
Linux |
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Originalnachricht |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
===================================================================== Red Hat Security Advisory
Synopsis: Important: kvm security update Advisory ID: RHSA-2015:1189-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1189.html Issue date: 2015-06-25 CVE Names: CVE-2015-3209 =====================================================================
1. Summary:
Updated kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 5.
Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
2. Relevant releases/architectures:
RHEL Desktop Multi OS (v. 5 client) - x86_64 RHEL Virtualization (v. 5 server) - x86_64
3. Description:
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems.
A flaw was found in the way QEMU's AMD PCnet Ethernet emulation handled multi-TMD packets with a length above 4096 bytes. A privileged guest user in a guest with an AMD PCNet ethernet card enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process. (CVE-2015-3209)
Red Hat would like to thank Matt Tait of Google's Project Zero security team for reporting this issue.
All kvm users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. Note: The procedure in the Solution section must be performed before this update will take effect.
4. Solution:
Before applying this update, make sure all previously released errata relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
The following procedure must be performed before this update will take effect:
1) Stop all KVM guest virtual machines.
2) Either reboot the hypervisor machine or, as the root user, remove (using "modprobe -r [module]") and reload (using "modprobe [module]") all of the following modules which are currently running (determined using "lsmod"): kvm, ksm, kvm-intel or kvm-amd.
3) Restart the KVM guest virtual machines.
5. Bugs fixed (https://bugzilla.redhat.com/):
1225882 - CVE-2015-3209 qemu: pcnet: multi-tmd buffer overflow in the tx path
6. Package List:
RHEL Desktop Multi OS (v. 5 client):
Source: kvm-83-273.el5_11.src.rpm
x86_64: kmod-kvm-83-273.el5_11.x86_64.rpm kmod-kvm-debug-83-273.el5_11.x86_64.rpm kvm-83-273.el5_11.x86_64.rpm kvm-debuginfo-83-273.el5_11.x86_64.rpm kvm-qemu-img-83-273.el5_11.x86_64.rpm kvm-tools-83-273.el5_11.x86_64.rpm
RHEL Virtualization (v. 5 server):
Source: kvm-83-273.el5_11.src.rpm
x86_64: kmod-kvm-83-273.el5_11.x86_64.rpm kmod-kvm-debug-83-273.el5_11.x86_64.rpm kvm-83-273.el5_11.x86_64.rpm kvm-debuginfo-83-273.el5_11.x86_64.rpm kvm-qemu-img-83-273.el5_11.x86_64.rpm kvm-tools-83-273.el5_11.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2015-3209 https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/
Copyright 2015 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1
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